Stone-surfacing wheel



Feb. 26 1924.

Filed Feb. 14, 1922 I 2 Sheets-Shut 1 Feb. 26 1924. 1,484,810

E.A.CHASE STONE SURFAG ING WHEEL Filed Feb. 14. 1922 2 Sheets-Sheet 2 fizw 2 Z/M Cad'a g WWW:

Patented Feb. 26, 1924.

* NITED TAT-Es ,PVATEN ELROY A. own, or noa'rnrrnnn, VERMONT.

sTonn-scarncme WHEEL.

Application filedFebruary 14, 1922. Serial No. 536,533.

To all whom/it may concern:

Be it known that I, ELROY A. CHASE, a

citizen of the United States, residing at called ironing process in which the rough, irregular projections are rapidly reduced or crushed by the use of steel-shot and heavy pressure. The wheel constituting myrpresentinvention is then used, with coarse emery or carborundum as a cutting agent, and

prepares the stone for polishing. 1

It is thus the object of my present invention to provide an improved surfacing wheel particularly designed for this intermediate operation, and by the use of which the time required is greatly reduced, with a corresponding reduction in labor and in the cost of the finished work.

With this general object'in'view, important features of my invention relate to the provision of a grinding surface for the wheel, formed of a plurality of concentric rings which, in their preferred form, are provided with a series of pockets on their working faces within which the grinding material may collect.

Another object of my invention is to provide improved means by which the grinding material may be supplied to a surfacing wheel. For this purpose I form the wheel with an axial opening within which is dis posed a number of arms having rearwardly and downwardly inclined feeding surfaces, the arms being so shaped that they act somewhat in the manner of propellers to carry the emery or other material to the grinding rings.

Other features of my invention relate to arrangements and combinations of parts which will be hereinafter described and more particularly pointed out in the appended claims.

A preferred form of my invention together with certain modifications thereof is shown in the drawings in which- Fig. 1 is a perspective view of my improved surfacing wheel;

- Fig. 2 is a partial sectional elevation thereof;

Fig. 3 is a partial bottom view of the grinding rings, looking in the direction of the arrow3 of Fig. 2; v

Fig. 4 is a detail side elevation of one of the rings, looking in the direction of the arrow 4 1n Fig. 2;.

5 is a partial sectional plan View of j the wheel frame, taken along the line 5--5 in Fig. 2; and

Figs. 6 and 7 are plan and side views of a portion of a grinding ring of modified form.

Referring to the drawings, I have shown a stone surfacing wheel comprising a frame 10 to the under side of which are bolted a plurality of concentric rings 11. The frame 10 is formed with an angular flange 12 and with a plurality of radial arms 13. These arms 13 extend outward from the flange 12 and may also be extended inwardly 'as' shown in Fig. 2.. The, arms 13 may be formed integral with the flange 12 and are preferably strongly braced against the flange by portions 14.

The rings. 11 are detachably secured to the under face of the arms 13 in any convenient manner as by bolts or screws 15 and each ring is preferably provided with a series of pockets 16 formed in the working face thereof.

In one form of my invention the pockets are as shown in Figs. 2 and 4, the rings being of substantially uniform width throughout their circumference and the pockets being triangular in vertical section, as clearly shown in Fig. 4. The grinding material tends to move outward by centrifugal force and portions .of the material enter the pockets 16 and are caught under the rear inclined faces of the pockets as the wheel rotates in the direction of the arrow a in Fig. 4.

In Figs. 6 and 7 I have shown a slightly modified structure in which the rings 20 vary in width, as-shown in Fig. 6,,the width of each ring being abruptly increased at the entrance of a pocket, thus providing a projection or shoulder to intercept the flow of grinding material along the inner face of the ring and to thus direct the material into the pocket 21. The outer side wall 22 of the pocket is also shaped to correspond more nearly to the probable line of flow of the material as it enters the pocket.

The wheel may be rotated by any suitable or convenient driving mechanism and I have shown herein a driving attachment24 comprising a pair of separated .earsto which may be pivoted the lower end of adriving shaft (not shown). The driving attachment 24 is connected to the flange 12 by a plurality of arms 25 extending from the at tachment 24 to the flange 12 and somewhat resembling in section the blades of a-screw propeller, the under faces of the arms being preferably provided with substantially helical surfaces. This construction of driving arm permits me to feed the grinding material through the openings '26 between the arms even when the wheel is rotating at relative high speed. The rearwardly and downwardly inclined under faces of the arms then carry the grinding material promptly downward to the center of the wheel, from which point it'flows-gradually outward past the different grinding rings. A stone surfacing wheel thus constructed will be evident that changes and modifica- 30.

tions can be made therein by those skilled in the artwithin the spirit and scope of invention as set forth in the claims, andI do not wish to be otherwise limited to the'details herein disclosed but what I claimis 1. A stone surfacing wheel having, in

combination, a frame comprising an upwardly extending flange, arms projecting radially from said flange, a driving'attachment, arms connecting said attachment; to said flz'mge, and a plurality of grinding rings secured to the under side of saidradial progresarms, each connecting arm being sivelyai'id substantially thickened from lts ,leading edge to the rear edge and having its lower face downwardly inclined rearward-13 .1

a 2. A stone surfacing wheel comprising a frame having an axial opening, a drivlng attachment, arms connecting said attachnient tosaid' frame, said arms having rearwardly thickened edges and substantially helical under surfaces and a plurality of :grinding rings secured to said frame.

3. A stone surfacing wheelcomprisinga frame, and a plurality of concentric rings secured to said frame, said rings having pockets intheir grinding faces and being of increased thickness adjacent the entrance of said pockets. V

- 1. A stone surfacing wheel :comprisingpa frame, and a plurality of concentric grindlng rings secured thereto, sald rlngs havlng' pockets: in theirilower faces and each pocket having an; outer'wall vgradually forwardly approaching the inner vertical face of its iring.

5. A stone surfacing wheel comprising a frame, and a plurality of concentric grind- 1ng rings secured thereto, said ringshaving ="po0kets in their lower faces and each pocket having an outer wall substantially. corresponding incurvature to the line of flowof the grinding mater-ialinto said pocket.

In testimony whereof I have hereunto affixed my'signature. V

. ELROY A. CHASE. 

